The Procyon 100 has only 635nm and 450nm, which is nowhere near enough spectral diversity to take a plant from veg to bloom, with good results. From what I've heard on many other forums, these lights make good veg lights or supplemental lights, but they certainly don't compare to a 400W in bloom.

If you want to get good grow results using LED's, you need to find a light that has the correct spectrum for marijuana. Weed uses 439nm, 469nm, 642nm, and 667nm for photosynthesis and 439nm, 483nm for carotenoids. You'll want a light that hits all of these, and one that does so with a narrow viewing angle. Most every product on the market uses a wide viewing angle (120 degree) or a varying angle (120 degree and 90 degree). If you want to make the most out of your grow with LED, and get good penetration, you need a 60 degree LED.